Counting large groups of objects to motivate grouping or place values (ie. counting by 10s and then counting by singles)
Key terms:
Place value, tens, ones, tally, sum
Prerequisite knowledge:
Students should be able to skip-count in groups of ten
A brief description of the "hook" or activity:
Bring a lot of M&M's to class. Challenge the class to count all of them correctly. Use this to motivate the idea of grouping by 10s.
Links to worksheets, interactive widgets, etc (please be as complete as possible here):
This is loosely based on the idea from http://illuminations.nctm.org/LessonDetail.aspx?id=L878 , although I think that it should be encouraged for the students to touch the objects being counted, as long as they are still keeping written records of some sort.
Notes on using this lesson / suggested assessment / etc:
Assess them afterwards by asking them to race to count out groups of 53, or 29, or 84 M&M's! Keep score, allow them to work in pairs, and turn it into a game in which they learn to practice using groups of 10 to count efficiently.
Specific topic:
Counting large groups of objects to motivate grouping or place values (ie. counting by 10s and then counting by singles)Key terms:
Place value, tens, ones, tally, sumPrerequisite knowledge:
Students should be able to skip-count in groups of tenA brief description of the "hook" or activity:
Bring a lot of M&M's to class. Challenge the class to count all of them correctly. Use this to motivate the idea of grouping by 10s.Links to worksheets, interactive widgets, etc (please be as complete as possible here):
This is loosely based on the idea from http://illuminations.nctm.org/LessonDetail.aspx?id=L878 , although I think that it should be encouraged for the students to touch the objects being counted, as long as they are still keeping written records of some sort.Notes on using this lesson / suggested assessment / etc:
Assess them afterwards by asking them to race to count out groups of 53, or 29, or 84 M&M's! Keep score, allow them to work in pairs, and turn it into a game in which they learn to practice using groups of 10 to count efficiently.Credit sources, if any:
This is loosely based on the idea from http://illuminations.nctm.org/LessonDetail.aspx?id=L878